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- W2055965944 abstract "Hydrodebromination of 4,4′-dibromobiphenyl to 4-bromobiphenyl and biphenyl was studied by using a variety of metal complexes of Ru(II), Ni(II), Pd(II), Pt(II) and Cu(I) under different ligand environments. Palladium complexes are most effective in giving biphenyl whereas other complexes give 4-bromobiphenyl. 1,1′-Bis(diphenylphosphino)ferrocene (dppf) is the best phosphine ligand whereas NaBH4 and N,N,N′,N′-tetramethylethylenediamine are the best reductant and base, respectively. The use of catalytic PdCl2(CH3CN)2 and PdCl2(dppf) gives 4-bromobiphenyl (86%) and biphenyl (100%) respectively. PdCl2(dppf) is effective even at a low concentration of 3.5 mol.% and at room temperature (r.t.) with a short reaction time (10 min) and performs better than Pd on charcoal (5%). It also leads to a complete breakdown of 4-monobromobiphenyl and decabromobiphenyl giving 100% of biphenyl in 4 min and 40 h, respectively." @default.
- W2055965944 created "2016-06-24" @default.
- W2055965944 creator A5024433417 @default.
- W2055965944 creator A5029620487 @default.
- W2055965944 date "1998-06-01" @default.
- W2055965944 modified "2023-10-16" @default.
- W2055965944 title "Room-temperature hydrodebromination of 4,4′-dibromobiphenyl catalyzed by 1,1′-bis(diphenylphosphino)ferrocene complexes of palladium" @default.
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- W2055965944 doi "https://doi.org/10.1016/s1381-1169(97)00274-4" @default.
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